Fix contradiction with context constructors #628
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The context constructor overloads in the `context` synopsis did not match the description in the text of the specification. We decided that the overloads in the synopsis were what we intended, so change the text to match. We also discovered that two constructor overloads taking a `platform` argument were present in SYCL 1.2.1 and were inadvertently dropped from the SYCL 2020 specification. Add them back. Clarify the behavior of the constructors when the set of devices is empty. We decided that this should throw an exception, which is consistent with OpenCL's `clCreateContext`. Closes KhronosGroup#470 Closes KhronosGroup#474
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The context constructor overloads in the
contextsynopsis did not match the description in the text of the specification. We decided that the overloads in the synopsis were what we intended, so change the text to match.We also discovered that two constructor overloads taking a
platformargument were present in SYCL 1.2.1 and were inadvertently dropped from the SYCL 2020 specification. Add them back.Clarify the behavior of the constructors when the set of devices is empty. We decided that this should throw an exception, which is consistent with OpenCL's
clCreateContext.Closes #470
Closes #474